Home Tools Subnet Calculator CIDR Chart /13

/13 Subnet Mask

Subnet Calculator DNS Tools Security Binary Converter Encoder

A /13 subnet mask is 255.248.0.0, with 524,288 addresses and 524,286 usable hosts.

CIDR prefix/13
Subnet mask255.248.0.0
Subnet mask (binary)11111111.11111000.00000000.00000000
Wildcard mask0.7.255.255
Network bits / host bits13 / 19
Total addresses524,288
Usable hosts524,286
/13 subnets in a /832

The mask ends 5 bits into octet 2, so blocks step in increments of 8 in that octet.

Try it with an address

Example /13 subnets in 10.0.0.0/8

Network First usable host Last usable host Broadcast
10.0.0.0/13 10.0.0.1 10.7.255.254 10.7.255.255
10.8.0.0/13 10.8.0.1 10.15.255.254 10.15.255.255
10.16.0.0/13 10.16.0.1 10.23.255.254 10.23.255.255
10.24.0.0/13 10.24.0.1 10.31.255.254 10.31.255.255
10.32.0.0/13 10.32.0.1 10.39.255.254 10.39.255.255
10.40.0.0/13 10.40.0.1 10.47.255.254 10.47.255.255
10.48.0.0/13 10.48.0.1 10.55.255.254 10.55.255.255
10.56.0.0/13 10.56.0.1 10.63.255.254 10.63.255.255

Frequently asked questions

What is the subnet mask for /13?

A /13 subnet mask is 255.248.0.0. In binary that is 11111111.11111000.00000000.00000000: 13 network bits followed by 19 host bits. The wildcard mask is 0.7.255.255.

How many usable hosts are in a /13?

A /13 holds 524,288 addresses in total. Subtracting the network and broadcast addresses leaves 524,286 usable hosts.

How many /13 subnets fit in a /8?

A /8 divides into 32 subnets of size /13, because each extra mask bit doubles the number of subnets.

Other prefix lengths

← /12 Full CIDR chart /14 →

Calculate this over HTTP: curl https://networkcalc.com/api/ip/192.168.1.0/13. See the Subnet Calculator API.